
Tape AL-50BT
Aluminum Foil with Conductive
Acrylic Adhesive
Data Sheet
Product Description
3M™ Tape AL-50BT consists of an aluminum foil
backing and a unique electrically conductive
pressure-sensitive acrylic adhesive.
• Soft aluminum foil backing
• Conductive acrylic adhesive
• Supplied on a removable liner for easy
handling and die cutting
• UL recognized for flame retardancy per UL
510, Product category OANZ2, File 59505.
Please consult with a 3M sales representative about
custom width and length. Standard length is 20M.
Applications
3M Tape AL-50BT is typically used for
applications requiring excellent electrical
conductivity from the application substrate through
the adhesive to the foil backing. Common uses
include grounding and EMI shielding in equipment,
components, shielded rooms, etc.
Shielding Effectiveness
Shielding effectiveness depends on conductivity,
permeability, thickness of metalization, adhesive
strength, degree of contact, smoothness of
application surface, strength and frequency of EMI
signal, etc. However, using standard tests and
fixtures, it is possible to determine a value for the
attenuation. (See chart below.)
Typical Properties
Properties Typical Value
Backing thickness 1 2.0 mil (0.050 mm)
Total thickness (backing plus adhesive) 1 3.1 mil (0.08 mm)
Adhesion to steel 1 3.4 N/cm
Electrical resistance through adhesive 2 0.01 Ω/25 mm2
* Foot notes: 1. ASTM-D-1000 Test method
2. 3M Test method 1.
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